Scraper



May 20, 1930. L p, REEN 1,759,505

SCRAPER Original Filed May 10, 1926 3 Sheets-Sheet 1' May 20, 1930. L, P; GREEN 1,759,505

- SCRAPER Original Filed May 10 1926 3 Sheets-Sheet 2 May 20, 1930. RGREEN 1,759,505

SCRAPER Original Filed May 10 1926 3 Sheets-Sheet 3 Patented May 20, 1930 UNITED STATES, r

LESLIE P. GREEN, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

IRA J. WILSON, OF WINNETKA, ILLINOIS SCRAPER Application med May 10, 1926, Serial No. 107,874. Renewed April 12, 1930.

My invention relates .to scrapers of the drag type especially'adapted for service in excavating, stripping, leveling, and the like,

can be accomplished automatically by the cooperation of the parts, so that material may be taken from an area a considerable distance on each side of the line of front and rear drag cables connected to the scraper;

Another object of my invention is to provide a bottomless scraper of the drag type in which the amount ofload carried thereby maybe 'predeterminately fixed at any point between '50 and 100% of the 'maximum capacity and while a scraper of this type has 29 been shown and described in my copending application filed February '13, 1926, Serial N 0. 88,007, and particularly in Figs. 7 and 8 of said application, this invention contemplates in combination with and controlled by the load control member, mechanism whereby undercutting or side cutting may be performed.

' To these ends my invention consists "in the novel combination and construction of the partsas more specifically set" forth and de-. scribed in the following specification and claims when considered in connection with the accompanying drawings in which:

Fig. 1 is a top plan View of my improved scrapershowing the control member in its raised position, 1

Fig. 2 is a longitudinal sectional view on the line 22 of Fig. 1,

Fig. 3 isa" front elevation of my forward improved. scraper showing the control member 1n ralsed position andthe cuttlng membersextendlng- Fig. 6 is a front elevational view showing i of the scraper shown in the I construction Fig. 5..

Likesymbols of reference herein indicate like parts in each of the figures of the drawing.

For the purpose of illustration, I have ATENT; v OFFICE shown one form of scraper in which I have embodied my invention, but it will be understood that I do not limit myself to any par-.

my invention can be applied to scrapers of many different shapes. In the form which I have shown in the drawings the scraper body has two side walls having parallel front 'ticular shape of scraper, as the principles of it ends 6 and 7 with diverging portions 8 and 9 respectively and a rear wall '11 extending transversely of the scraper and uniting the. diverging portions 8 and 9. These side walls are preferably made froma single sheet of heavy metal cut and bent to the desired shape, although in some instances, they are formed separately and connected by rivets or bolts. The lower portions of the side walls are bent inwardly, as indicated by the reference char acters 13 and 14:, and the corresponding portion of the rear wall 11 is bent forwardly as indicated by reference character 16. The metal, below the bent line'of these walls, is cut away at the juncture of the rear and side walls, so as to provide tight joints along the lines 17 and 18. VVearplates 19, 21, and 22,

Y may be securely attached by rivets, bolts, or

the like, to the inclined portions 13, 14, and

16 of the side and rear walls, and these plates project beneath the lower edges of the said walls and end as shownin the drawings, thus providing hardened cutting and scraping edges possessing I greater durability under wear than the metal of which the wallsthem- I selves are formed, and by so'constructing the scraper, the wear plates have the additional advantage that they may be removed and replaced by others when they become worn out or broken.

At the front of the straight portions 6 and 7, the scraper is provided with a cutting plate r 23 and 24 respectively, andeach of said plates is fastened to said straight portions by a pair of hinges 26, and the pintles of said hinges I en and these members are'connected by-an angular bar 36 which extends the full width,

ofsaid scraper and which is provided at one side of the same with an upright bar 3 7 which 7, has its upper end bent to form the angular portion 38'to which aneyelet 39 is attached.

W'ithin the scraper is a load control plate 41,

and this plate is substantially the same shape as. the area included between thestraight portions 6 and- 7 *of-the: sidewalls, the diverging portions 8 and 9 and rear wall 11 and this plate. is provided .on its upper surface with angle bars 42- and 43,, and the upright leg 44 of the angle bar 42 has fastened thereto by: the rivets 46 an. extension plate 47 on the outer end of which is located a sheave-48. The angle bar 43 has an extension bar 49 secured to its; uprightleg 51 by rivets 52, and the outer end. of this. extension bar is also pro-' vided with a sheave 53. The extension bars 47' and 49 are pivotally mormted'in brackets 54and 56 Whiclaare' secured to the under face of thetangil'e bar 36. by suitable bolts or rivets 57.

A; chain 58:is' fastened in the eyelet 39, passes: under the sheave 48',- and is engaged by a grab hook 59 fastened on a short length of chain 61 whose other end is connected in any suitable manner with a link 62 on the bracket 32;. A chain 63 is fastened in any suitable manner onto the eyelet 640n the inside of the straight portion 7, and this chain passes over the-sheave 53 andis enagedby the grab hook 66 'onone end of a shortzlengthof chain 67wh-ichhas its other end fastened in the link 68 in the bracket 31. These grab hooks 59- and 66, are adaptedto engage their respective chains at any desired point, and the chain is preventedfrom slipping bythe links on each side of-the hook.

The rear-"wall 'of the' scraper is provided with an upright member'69 which is secured to said rear" wall by the rivets- 71-, a ndthehorizontal portion 72 is provided wit'hla slot 73- throughwhi'ch a limiting bar 74 is adapted to extend,lanld said limiting bar is pivotally I mounted at its lower end in the boss .76 on lthe upper. face'of said load control plate; The limiting bar 74 has a series of holes 77 throughout its length and aibolt may be 7 placedthrough any one of these holes so as tostrike against the horizontal portion 72 of the member 69 to limit the upward move mentof the load control plate. The load contrjol plate 41 is also provided with. a boss 78' for anchoring the, tension rod 7 9-and said rod extends through the overhanging portion- 81 of the member 69 and is provided with a spiral spring fitting between the said overhanging portion81, and a nut 82 located near the bottom of said rod.

The operation ofmy improved scraper is as follows: Considering the load control plate 41 in the position shown in the dotted lines in Fig. 2, the cutting plates 23 and 24 will be thrown to an angle such as is shown by the dotted lines in Fig. 1, so that as the r scraper is dragged: forward by the usualcablcs (not shown) the angular position of the cutting plates will tend to throw the scraper 9 out of line with the: drag cables and thus perform side cutting'and undercutting in case of a hillside. As the material enters beneath the load control plate 41, said plate is raised 7 and will continue to rise to the position shown by the full lines in Fig. 2 provided itselevation has not been limited by the limiting bar 74. When the plate isin the position shown i-nthe full lines in Fig. 2, the chains 58 and 6.3 will have drawn the cutting plates} 23 and 24 back to the position shown by the ful'llines in Fig. 1, and the scraper will have been drawn back into its, alignedposition between the drag cables. Scrapers of this type are either drawn over a hopper in order to dump the content-s, or are, drawn backward" by a rear drag cable to back ofi and when the load has been deposited from, my type of scraper, the weight of the load control plate will automatically be sufiicient tov causethe j plate to drop to the position shown by the" V dotted lines in Fig. 2, and if necessary,couni terweights can be placed on the rear ofsaid plate, orthe tension'rod and spring device shown in the drawings. may be employed.

Thisis intended to insure the falling of the .7

control plate into the bottom of the scraper" when the same has beenemptiecl, and the fall of the plate will raise the. forward end of the extension bars 47 and 49, and as the sheaves on the ends'of each of these bars are in the bight ofthe chains 58'and 63, the chain 63- Will draw the cutting plate 23 around tothe position shownby the. dotted line in'Fig. 1,

and by reason ofthe connection of, the cut tingplate 24 with the cutting plate23 through the connecting bar 27, both cutting plates'will be'thrown to. the angle shownbythe dotted lines in Fig. 1 i

As the control plate is raised, the forward 7 ends of the extension; bars 47 49 will be:

lowered, and the sheave 48 acting in the ,bight of the chain 58fwill "draw the cutting r plate 24, and on? account ofits connectiointhe.

cuttingplate 231will'als'olbe drawn-around the position shown by the, full linesin Fig. 1.1 f

It is understood-that the up right bar 37 may be changed tothe other end of the angle bar 36"and fastened thereto through the holes 88, and the chains connected up. injust the opposite manner, in orderto provide for side cutting .inan opposite. direction. It.

will also be understood that the drag chains." i

will be connected in this type of scraper with the inside of the Walls in such a manner that they will not interfere'with the operation of the side cutting plates.

In the modified construction shown in Figs.5 and 6, I have shown the load control plate 41 provided with an upwardly inclined tail portion 84. The control plate is pivotally attached to the angular bar 36 by the eX- tension bars 47 and 49 which in turn have their forward ends pivoted. as shown at to the brackets 54 and56 respectively. The load control plate 41' is'limited in its upward movement with respect to the scraper by an L shaped bracket 86 which is secured to the rear wall 11 of the scraper and is'positioned to engage the tail portion 384- as shown in Fig. 5. The mechanism for controlling the angularity of the cutting plates 23 and 24 in the construction shown in Figs. 5 and 6 comprises a longitudinally extending lever 87 which is pivotedintermediate its a bolt 91" to spaced apart brackets 92 which in turn are secured to the rear end of the control plate 41. These connecting bars 91 are connected adjacent to the rear end of and on the opposite side of the lever 87 by means of a bolt 93 which extends through registering aperturesin, the lever and in the brackets 94 which are secured tothe opposite sides of the lever. The connecting bars 90-91 are provided'with a plurality of apertures 95 for adjusting the control plate with respect to the lever for permitting the changing of the operative relation between the cut.- ting knives and the control plate. I Pivotally secured to the forward end of the lever 87 with respect to the lever 87-. Additional,

and preferably on the'opposite sides thereof are two angle members 95 and 96.. These an-v gle' members are provided with aplurality of apertures 97 whereby they may be adjusted apertures 98 are provided on the forward end of the lever 87 so that the angle members 95 and 96 respectively may be adjusted relative to the fulcrum 88'of the .ileverin controlling the angle through which the cutting plates 23 and 24 respectively may be swung. The lower end of angle member 95 is operatively connected to the cutting plate 24 by means of achain 99 which has one end secured as shown at 100't0 the transverse angle'bar 36 and the other end thereof secured to thebracket 32. The intermediate portion of the chain 99 is secured by means of a bolt 101 in a slot 102 formed in bl19' lowerend of the angle member 95. 'A second chain 103 is secured to the side wall 7 by means of an eyelet 64. The other end of the chain 103 is secured to the bracket 31 of the cutting plate 23. The intermediate/portion of the chain 103 is secured in the slot 104 inthe lower end of the angle member 96 by means of a bolt 105.

107. Trained about the sheave 107 is arear drag cable 108 which extends upwardly and is connected to the rear end of the lever 87 as shown in 109.

In order to reinforce and strengthen the forward portion or side walls 6 and 7 I have provided. an additional brace or angle member 110 which is located midway of the Secured to the rear end of the scraper a 3' bracket 106 in which is journaled a sheave height of the walls and secured adjacent the f forward edges of the walls to inwardly eX- tending portions 111 which are formedii1- tegrally with the brackets 33 and 34'respec tively. i

The operation of my scraper shown in the modified form in Figs. 5 and 6 is as follows:

Assuming that the load control plate 41 is in its lowermost position or a position similar to that shown in Fig. 2, the rearend of V the lever 87 will be ina position horizontally below its fulcrum 88, with the lifting angle members 95 and 96 in their elevated positions. '100 In this position the tension on the chain 99 will be released or the bight in the chain reduced. At the same time, the bight in the 3 chain 103 will be raised thereby swinging the cutter plate 23 inwardly with respect to the wall of the scraper and by reason of the tie bar 27 connecting the cutter plates' 23 l and 24 respectively,.these cutter plates will be moved simultaneously. When the cutter plates and the load control plate 41 are in this assumed position; as the material enters below the load control plate 41, the plate will continue to rise until is assumes the position shown in Fig. 5 where the tail por-.

tion 84 engages the stop 86. When the plate 41 is in this position, the chain 99 will have drawn the cutter plates 23 and 24 back to the position shown in Figs. 5 and, 6 and they scraper will have b een'drawn back into. the In lined. position between the drag-"cables. 7 order to discharge the load from the scraper from my modified forms shown in Figs. 5

and 6, the scraper is drawn rearwardly by the rear drag cable 108 thereby depressing the control plate 41 within the scraper and discharging thecontents thereof through the bottom of the scraper in the manner described in my co-pending application above referred to i I do not limit myself tothe constructions shown in this application, as various'other fsaid' scraper.

, methods may be employed for providing a cooperative movement between the control plate and the cutting plates. This, however,

is one of the important features of this in- V 'vention and I claim any method whereby the control plate, by its movement, controls the angle at which the cutting plates are disposed. 7

' Various other modifications and changes in jfi. the design'and construction of my improved scraper will undoubtedly suggest themselves to persons skilled in this art, and while I have shown and described a preferred form of my invention, it should be manifest that ithe invention is capable of a wide range of variations without departing from the scope thereof as defined inthe following claims.

' 1. Ina bottomless drag scraper, a load 26- control member pivoted at its forward end to the upper front end of said scraper and having its rear end normally resting in therbottom of said scraper and adapted to be raised by the entrance ofmaterial under said mem- '25' ber, and means for limiting the upward movement of said member to thereby control the amount of" material carried by said scraper. a 7 7 V 2. In a bottomless drag scraper, a cross bar connecting the upper forward ends there of, a load controlmember having arms rigidly secured thereto and pivotally mounted on said bar. to permit the rear end of said member to be normally moved from the bot -tom to the top of said scraper by the matei rial entering the same, and means for limiting the upward movement of said member ..to thereby control the amount of material carried'by said scraper. o i In a bottomless drag scraper, a load' con trolmember pivoted at its forward end to the upper front end of said scraper and having its rear end normally restingin thebottom of said scraper and adapted to be raised -by the entrance of material under said memher, and abar on the rear end of said member having means thereon for limitingthe up-. ward. movement of said member to thereby carried by I rear end rises and fans in said scraper, cute ting plates hinged to the front oftheside vgalls of said scraper, a cross bartying said 5 I plates 1 together, and means; connecting said control member and-saidside plates whereby V the forwardedges' of saidiplates are: disposed; 120' control the amount of material 4'. I I trol member pivoted at its forward end to the upper front end' of said scraper and having- M its rear end normally'resting in the bottom of said" scraper and adapted to be raised by the entrance of material under said member,--

means for limiting theupWard movement of said member to thereby control the amount a of material carried by "said scraper, and

means for returning" the rear, end of said member tothe bottom of the scraper when the load has been discharged;

5. In a bottomless drag scraper,.a cross bar connecting the upper forward ends thereof, r a 'loachcontr ol member having armsrigidly bottomless dragscraper, a loadcon secured thereto and pivotally mounted on saidbar to permit the rear end of said member to be normally moved from the bottom l to the top of said scraper by the material entering the same, means for limiting the upward movement of said member to thereby control the amount of material carried by said scraper, and means for returning thef 7 rear end of said member to the bottom of'the scraper when the load has been discharged? I 6. In a bottomless dragfscrapena'loa'd con' trol member pivoted at its forward end to the upper front end of said scraper and having its rear endnormally resting in the bottom of said scraper and adapted to be raised by the entrance of material under said inembe-r,a

bar on the rear end of said member I. In a bottomless drag scraper, a load control member for predeterminately fixing the amount of load to be earned" by said scraper,

and means extending from the front of the side walls of said scraper for accomplishing side cutting.

8. In a bottomless dragscraper, a loadcontrol member for predeterminately fixing the amount of load to be carried by said,

soraper, and means hinged to the front ofthe l side Walls of said scraper for accomplishing. a

side and under cutting.

9 In a bottomless drag scraper, a load 06a t ol member for predeterminately fixingthe amount of load to be carried by said scraper;

and cutting plates extending fromthe front I of the side walls of said scraper for accom plishing slde and under cutting, r i

10. In a bettomlessjdrag scraper, load, v control member for predeterminately fixing,

the amount of load tobe carriedby said scraper, and cutting plates hinged to the front of the sidewalls of said scraper for;

' accomplishing side and under cutting. V

' 11; In a b'ottomle'ss drag scraper, load control member pivotallymounted so that its o 1 at an angle to" the'line of'draft of said scraper when therear end of said controYmember is j at the bottom of said scraper and adapted'to be drawn into a position parallel with'theline 12. In a' -bottom-less drag scraper, digging members connected Withs'aid scraper,'a'nd anautoma tic load control member operatively connected to said digging members for regu-i lating the cutting angle thereof in accordance with the amount of load. 7

13. In a bottomless drag scraper, a load control member pivoted at its front end and having its rear end adapted to rise and fall in said scraper, digging members connected with the front edge of the side walls of said scraper, and means through which said control member is adapted to control the cutting angle of said digging members by the rise and fall of its rear end.

14. In a bottomless drag scraper, a cross bar extending between the upper forward ends thereof, a load control member having its rear end adapted to rise and fall in said scraper, forwardly extending arms secured at one end to said control member and pivotally secured to said. cross bar, digging members hinged to the front edges of the side walls of said scraper, a cross bar connecting said digging members, a pair of chains having one end of each secured to opposite sides of the scraper and having the other 'end of each secured to the digging member on the opposite side wall, and means engageable with said chains for angling said digging members with respect to the line of draft of said scraper when the rear end of said control member is falling to the bottom of said scraper. v

15. In a bottomless scraper, a cross bar extending between the upper forward ends thereof, a load control member adapted to rise and fall in said scraper, forwardly eX- tending arms secured at one end of said control member and pivotally secured to said bar, digging members hinged to the front edge of the side walls of sald scraper, a cross bar connecting said digging members, a

' chain having one end secured to one side wall of the scraper'andthe other end secured to the digging member on the opposite side wall of the scraper, means engaging in and adapted to raise the bight of the chain as the load control member swings downward, thereby exerting tension on the diggingmembers that will force said digging members at an angle with respect to the parallel portions of the I side walls.

member and pivotally secured to said bar, I

digging members hinged to the front edges of the side walls of saidscraper, a cross bar con-V necting said digging members, a chain having one end secured to one side wall of the scraper and the other end secured to the digging member on the opposite side wall, said chain being adjustable in length to stop the digging member approximately parallel with the center line, means engaging in and adapted to raise the bight of the chain as the load control member swings downward thereby exerting tension on the digging member ,that willforce said digging member at an angle withlt'he parallelportio nsof the side walls, a second chain having one end secured ,to the other side engaging in and adapted to thrust the big-ht of said second chain downward as the load control i'nember swings upward, thereby exerting tension on the'digging members'that will "force sai'ddigging members'on' a line with the parallel portion of the sidewalls.

17, a bottomless drag scraper, load control member pivoted to said scraperfjand means carried by said scraper operatively connected with said load control member for diverting the course of said scraper." I

'18. In a bottomless drag scraper, a load control member pivoted to said scraper, and

means carried on the forwardend' of scraper and 'operatlvely connected with said load control'inember for diverting thecourse of said scraper. 19. In a. bottomless drag scraper, a'load control member pivoted to said scrapenand means pivotallycarried on the forwardyend of said scraper and operativelyconnected ia rert a' with said load control Inem the course of said scraper;

20. In a bottomless drag scraper,-a load control member pivoted tosaid scraper, and

of said scraper and simultaneously operated by said load control member for diverting the'course of said scraper.

21. In a bottomless drag scraper, aglo' ad and operativelyconnected said lead tem o-1 member, and'm'eans pivotally connectedjto the forward end'of the member pivoted to the scraper and' operativelyjconnected with said cuttingmembers for controlling'tlie cutting angle thereof. l 22. In abojttomless drag scraper, a load control member pivoted at its front lend jand in said scraper, cutting members pivotally connected to' the forward end'of'saidfscraper, a member fulcrumed intermediate li tsends on said scraper and operatively connected to said load control member, a pair of chains having one of their ends connected to saidsc raper and the other of their ends connected totheir respective cutting'members, and a plurality. of members pivoted to said fulcrumed memher and connected to the intermediatev por- 1 tions of said respective chains for operatively connecting said cutting members with-said load control member.

23.. In a bottomless drag scraper, a load means pivotally carried on the opposite 'gijd i 100 1 15-. having its rear end adapted ,to rise and fall I 6 V V a V 1 "11,759,555

control member fo'r predeterminately fixing the amountroii'fload to 'be carried by said 7 j scraper, and cutting means operatively connected to said control member and automaticallyvcontrolled thereby in accordance with l 't heload.

v '24. In a bottomless scraper, afload control member for predeterminately fixing the amount of load tobe carriedby said scraper,

lf digging'memb'ers, and means controlled by said load controlmember for regulating the cutting angle of said digging members by the rise and fall of said control member.

' 25. In a bottomless scraper, a: floating '1 i1 member 'hing'edly mounted and adapted 'to {rise with the material: entering'said scraper Jjanfd; fall when saidscraper is empty, digging v memberslhingedto the front oftlie sidewalls of said scraper, and means ,controlled by' the w 'zoran ofsaidfloating'member for forcing said V V digging members in aposition to dig from the j ;side and by the "risevof sai'd floating member for forcing said diggingmembers to aneutral position-ivheli the scraper is loaded. 7

R5 26. In abottomless scraper, a load control 1 member for, predeterminately fixing j the 1 amount of load to be carried bysaid scraper,

digging members connected With the front edges of the sidewalls of said scraper, and

'- 30 means "for con'trolling the cutting an le of 'said'digging members by the rise and all of saidcontrolfimember. f V j 27;,"In a bottomless scraper, a floating member hingedly mounted and adapted to I ''rise with the material entering said scraper andffall Whensaid scraper'is empty, digging members hingedto the front ofthe side Walls ofgsaid' scraper, and means through which said floating member i's'yadapted to I force the i 4 0 digging member in position to dig from the side the fall of said floating member and to iorcejsaitldigging member to a neutral jpositioniby the risejo'f the-floating member when'thejscraperis loaded-.

45 28n-In' a bottomless scraper, a load control member for ,p'redeterminately fixing the v amount of load to be carried by'said scraper, V digging members connected with the -front edges of the side walls of said scraper, and

V T 1 means through which said load'control mem- 5 nature.

her is, adapted to control the'cutting angle of said fdiggingrnembers by the'riseand fall of said control memberi In Witness of-theflforegoing I affix sigi QE LIE .1 GREEN. 

